MP4 to MKV Converter - Free, Fast Remux
Repackages your MP4 into an MKV container - video and audio are kept as-is, so this is fast and lossless.
How to use MP4 → MKV
- 1Drag and drop your file, or click to select it.
- 2Click Convert to run MP4 → MKV.
- 3Download the result - your file is deleted automatically within 24 hours.
Drag & drop a file here, or click to browse
Your file is only processed temporarily for the conversion and is automatically deleted within 24 hours.
Frequently Asked Questions
Does this re-encode my video?
No, this only repackages the container - no quality is lost and conversion is fast.
Why choose MKV over MP4?
MKV is an open format popular for archiving and for videos with multiple audio or subtitle tracks.